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(ModeL) G. J. DIGKSON.

TRANSOM ADJUSTER.

No. 259,297. Patented June 13, 1882.

B ,LEELLEIMMI In venwn I jf'lnesses: V

N. PETERSY Pholobthngraphef, Wnhingicn, n. a

GILBERT J. DIGKSON, OF ALBANY, NEW YORK.

TRANSOM -ADJUS TER.

SPECIFICATION forming part of Letters Patent No. 259,297, dated June 13, 1882.

Application filed December 12, 1881.

To all whom it may concern:

Be it known that I, GILBERT J. DICKSON, of Albany, New York, have invented a new and usefulTransom or Pivoted Sash Lock and I do hereby declare that the following is a full, clear, and exact description of the invention, which will enable others skilled in the art to which it appertains to make and use the same.

My invention relates more particularly to pivoted transom or window sash locks, the object of my improvements being to automatically lock the said sash at any point of its radius to which it may be moved, and also to provide said lock with an operating arm or handle whereby said sash may be unlocked and moved to any position by simply pressing against said handle in the direction in which the sash is intended to be moved, which may be done with the hand or any instrument by which it can be reached. 1 attain these objects by the mechanism hereinafter described 7 in this specification and illustrated in the ac companying drawings, making a part thereof, in which Figure 1 is a perspective of my improved transom or pivoted sash lock. Fig.2isalongitudinal section of the same. Fig. 3 is an inner face view of the jamb or stationary pivotplate. Fig. 4 is an inner face view of the sash or moving pivot-plate and operating jointed arm and locking-sleeve, with a section of the jamb or stationary plate, as shown in Fig. 3. Fig. 5 is a detached partial view of the same with the handle-section of the operating-arm and locking-sleeve removed. Fig. 6isa longitudinal inner face view of the locking-sleeve. Fig. 7 is a cross-section of the operating-arm, taken through the line X. Fig. 8 is a crosssection of the same, taken through the lineW. Fig. 9 is a cross-section of thesame, taken through the line Y. Fig. 10 is a longitudinal section of the locking-sleeve. Fig. llis adetached view of the handle-section of the operating-arm.

Similar letters of reference indicate corresponding parts throughout the several views.

The pivot-plates A and B, as shown in Figs. 1, 2, 3, and 4, are made allittle over a semicircle, and may be made a complete circle, if so desired. Each of the said plates is provided with a projecting flange around the outer edge of the inner face. The flange d on plate A,

(Model) which is provided with the V-shaped teeth or gearing a around its inner circumference, as shown in Fig. 3, fits inside the flange c of the pivot-plate B, as shown in Fig. 4, so that said flanges lap each other, covering the joint between said plates, as shown in Figs. 1 and 2, thereby excluding cold air or dampness which would otherwise pass through said joint. The plateA is also provided with the pivot-pin b, cor.- responding to the pivot-hole f in the plate B,as shown in Figs. 1, 2, 3, and 4. The plate B has rigidly formed on its outer face the shouldersection of the operating-arm F, as shown in Figs. 1 and 2, which is turned down so as to form the shoulder l and receive the spiral spring h, as shown in Figs. 2, 5, and 8. Said arm F carries the locking-sleeve O and spring h, and has secured to its projecting end by means of a tongue-and-socket joint the forearm or handle-section D of said arm, as shown in Figs. 1, 2, and 4. The said forearm or handle D is provided with the shoulders s s on opposite sides of the joint-socket, as shown in Figs. 1, 2, 4, and 11, which butts against the end of thelocking-sleeve (l, as shown in Figs. 1, 2, and 4. The locking-sleeve (J has formed on its inner face the projection t, as shown in Figs. 6 and 10, which is toothed or geared to match the gearing on the flange d of plate A, with which it engages, as shown in Figs. 2 and 4. The plate B is notched out opposite the arm F, as shown in Fig. 5, to admit the toothed projection tof lockin g-sleeve G to pass through said plate and engage with the gearingon plate A, as shown in Figs.2 and 4. The end of the sleeve 0 next to the handle-section D of the arm F is concaved so as to fit around the joint. The opening or inner surface of said sleeve is contracted at the end next to the joint forming the shoulder k, as shown in Figs. 2 and 10, against which one end of the spiral spring h rests, the otherend restingagainst the shoulder lofthe arm F, which keeps said lockingsleeve engaged with the geared pivot-plate A and thehandle-section D of the arm F, as shown in Figs. 2 and 4, thereby locking the plate B, which is secured to the sash, to the plate A, secured to the jamb or casement of the window.

Operation: Said lock, always being in a locked position when at rest, may be unlocked and the sash moved in either directionbysimply pressing against the forearm or the handle section 1) of the jointed arm F in the direction the operator desires the sash to swing, which will bend the arm F at the joint between the shoulder and handle section, as shown by dotted lines in Fig. 4. The shoulders s s of said handle, which butt against the end of the sleeve 0, move said sleeve back against the spring h on the shoulder-section of the arm F, thereby disengaging the locking-sleeve from the plate A, as also shown by dotted lines in Fig. 4, allowing the sash to move in the direction of the pressure; and when the pressure is removed the sleeve is thrown into a locked position by the springh, as before, as shown by full lines in Figs. 2 and 4.

This lock is applicable to any kind of pivoted or hinged window or transom, either vertical or horizontal. I

The handle-sectionD may be connected with shoulder-section by a universal joint, if so desired.

Having thus described my invention, what I claim, and desire to secure by Letters Patent, 1s-

The pivot-plate 13, having the operating jointed arm F provided with the handle-section D, and the locking-sleeve or slide 0, having the toothed projection t, and spring h, incombination with the geared pivot-plate A, for the purpose and substantially as specified. V

GILBERT J. DIGKSON.

Witnesses:

WILLIAM E. FITCH, J. J. AL'IMAYER. 

